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<FONT color="green">001</FONT>    /**<a name="line.1"></a>
<FONT color="green">002</FONT>     * $Id: ClassUtil.java 220 2012-08-17 18:20:17Z steven.jardine@gmail.com $<a name="line.2"></a>
<FONT color="green">003</FONT>     */<a name="line.3"></a>
<FONT color="green">004</FONT>    package com.gwt.ss;<a name="line.4"></a>
<FONT color="green">005</FONT>    <a name="line.5"></a>
<FONT color="green">006</FONT>    import java.io.File;<a name="line.6"></a>
<FONT color="green">007</FONT>    import java.io.IOException;<a name="line.7"></a>
<FONT color="green">008</FONT>    import java.net.URL;<a name="line.8"></a>
<FONT color="green">009</FONT>    import java.util.ArrayList;<a name="line.9"></a>
<FONT color="green">010</FONT>    import java.util.Enumeration;<a name="line.10"></a>
<FONT color="green">011</FONT>    import java.util.List;<a name="line.11"></a>
<FONT color="green">012</FONT>    import java.util.Set;<a name="line.12"></a>
<FONT color="green">013</FONT>    import java.util.TreeSet;<a name="line.13"></a>
<FONT color="green">014</FONT>    import java.util.zip.ZipEntry;<a name="line.14"></a>
<FONT color="green">015</FONT>    import java.util.zip.ZipInputStream;<a name="line.15"></a>
<FONT color="green">016</FONT>    <a name="line.16"></a>
<FONT color="green">017</FONT>    import org.slf4j.Logger;<a name="line.17"></a>
<FONT color="green">018</FONT>    import org.slf4j.LoggerFactory;<a name="line.18"></a>
<FONT color="green">019</FONT>    <a name="line.19"></a>
<FONT color="green">020</FONT>    /**<a name="line.20"></a>
<FONT color="green">021</FONT>     * Utility class to find classes in a package.<a name="line.21"></a>
<FONT color="green">022</FONT>     * <a name="line.22"></a>
<FONT color="green">023</FONT>     * @version $Rev: 220 $<a name="line.23"></a>
<FONT color="green">024</FONT>     * @author Steven Jardine<a name="line.24"></a>
<FONT color="green">025</FONT>     */<a name="line.25"></a>
<FONT color="green">026</FONT>    public final class ClassUtil {<a name="line.26"></a>
<FONT color="green">027</FONT>    <a name="line.27"></a>
<FONT color="green">028</FONT>        private static final Logger LOG = LoggerFactory.getLogger(ClassUtil.class);<a name="line.28"></a>
<FONT color="green">029</FONT>    <a name="line.29"></a>
<FONT color="green">030</FONT>        /**<a name="line.30"></a>
<FONT color="green">031</FONT>         * Recursive method used to find all classes in a given directory and subdirs. Adapted from<a name="line.31"></a>
<FONT color="green">032</FONT>         * http://snippets.dzone.com/posts/show/4831 and extended to support use of JAR files<a name="line.32"></a>
<FONT color="green">033</FONT>         * <a name="line.33"></a>
<FONT color="green">034</FONT>         * @param directory The base directory<a name="line.34"></a>
<FONT color="green">035</FONT>         * @param packageName The package name for classes found inside the base directory<a name="line.35"></a>
<FONT color="green">036</FONT>         * @return The classes<a name="line.36"></a>
<FONT color="green">037</FONT>         * @throws ClassNotFoundException<a name="line.37"></a>
<FONT color="green">038</FONT>         */<a name="line.38"></a>
<FONT color="green">039</FONT>        private static Set&lt;String&gt; findClasses(String directory, String packageName) throws Exception {<a name="line.39"></a>
<FONT color="green">040</FONT>            Set&lt;String&gt; classes = new TreeSet&lt;String&gt;();<a name="line.40"></a>
<FONT color="green">041</FONT>            if (directory.startsWith("file:") &amp;&amp; directory.contains("!")) {<a name="line.41"></a>
<FONT color="green">042</FONT>                String[] split = directory.split("!");<a name="line.42"></a>
<FONT color="green">043</FONT>                URL jar = new URL(split[0]);<a name="line.43"></a>
<FONT color="green">044</FONT>                ZipInputStream zip = new ZipInputStream(jar.openStream());<a name="line.44"></a>
<FONT color="green">045</FONT>                try {<a name="line.45"></a>
<FONT color="green">046</FONT>                    ZipEntry entry = null;<a name="line.46"></a>
<FONT color="green">047</FONT>                    while ((entry = zip.getNextEntry()) != null) {<a name="line.47"></a>
<FONT color="green">048</FONT>                        if (entry.getName().endsWith(".class")) {<a name="line.48"></a>
<FONT color="green">049</FONT>                            String className = entry.getName().replaceAll("[$].*", "").replaceAll("[.]class", "")<a name="line.49"></a>
<FONT color="green">050</FONT>                                .replace('/', '.');<a name="line.50"></a>
<FONT color="green">051</FONT>                            if (className.startsWith(packageName)) {<a name="line.51"></a>
<FONT color="green">052</FONT>                                classes.add(className);<a name="line.52"></a>
<FONT color="green">053</FONT>                            }<a name="line.53"></a>
<FONT color="green">054</FONT>                        }<a name="line.54"></a>
<FONT color="green">055</FONT>                    }<a name="line.55"></a>
<FONT color="green">056</FONT>                } finally {<a name="line.56"></a>
<FONT color="green">057</FONT>                    zip.close();<a name="line.57"></a>
<FONT color="green">058</FONT>                }<a name="line.58"></a>
<FONT color="green">059</FONT>            }<a name="line.59"></a>
<FONT color="green">060</FONT>            File dir = new File(directory);<a name="line.60"></a>
<FONT color="green">061</FONT>            if (!dir.exists()) { return classes; }<a name="line.61"></a>
<FONT color="green">062</FONT>            File[] files = dir.listFiles();<a name="line.62"></a>
<FONT color="green">063</FONT>            for (File file : files) {<a name="line.63"></a>
<FONT color="green">064</FONT>                if (file.isDirectory()) {<a name="line.64"></a>
<FONT color="green">065</FONT>                    assert !file.getName().contains(".");<a name="line.65"></a>
<FONT color="green">066</FONT>                    classes.addAll(findClasses(file.getAbsolutePath(), packageName + "." + file.getName()));<a name="line.66"></a>
<FONT color="green">067</FONT>                } else if (file.getName().endsWith(".class")) {<a name="line.67"></a>
<FONT color="green">068</FONT>                    classes.add(packageName + '.' + file.getName().substring(0, file.getName().length() - 6));<a name="line.68"></a>
<FONT color="green">069</FONT>                }<a name="line.69"></a>
<FONT color="green">070</FONT>            }<a name="line.70"></a>
<FONT color="green">071</FONT>            return classes;<a name="line.71"></a>
<FONT color="green">072</FONT>        }<a name="line.72"></a>
<FONT color="green">073</FONT>    <a name="line.73"></a>
<FONT color="green">074</FONT>        /**<a name="line.74"></a>
<FONT color="green">075</FONT>         * Scans all classes accessible from the context class loader which belong to the given package and<a name="line.75"></a>
<FONT color="green">076</FONT>         * subpackages. Adapted from http://snippets.dzone.com/posts/show/4831 and extended to support use of JAR<a name="line.76"></a>
<FONT color="green">077</FONT>         * files<a name="line.77"></a>
<FONT color="green">078</FONT>         * <a name="line.78"></a>
<FONT color="green">079</FONT>         * @param packageName The base package<a name="line.79"></a>
<FONT color="green">080</FONT>         * @return The classes<a name="line.80"></a>
<FONT color="green">081</FONT>         * @throws ClassNotFoundException<a name="line.81"></a>
<FONT color="green">082</FONT>         * @throws IOException<a name="line.82"></a>
<FONT color="green">083</FONT>         */<a name="line.83"></a>
<FONT color="green">084</FONT>        public static Class&lt;?&gt;[] getClasses(String packageName) {<a name="line.84"></a>
<FONT color="green">085</FONT>            try {<a name="line.85"></a>
<FONT color="green">086</FONT>                ClassLoader classLoader = Thread.currentThread().getContextClassLoader();<a name="line.86"></a>
<FONT color="green">087</FONT>                assert classLoader != null;<a name="line.87"></a>
<FONT color="green">088</FONT>                String path = packageName.replace('.', '/');<a name="line.88"></a>
<FONT color="green">089</FONT>                Enumeration&lt;URL&gt; resources = classLoader.getResources(path);<a name="line.89"></a>
<FONT color="green">090</FONT>                List&lt;String&gt; dirs = new ArrayList&lt;String&gt;();<a name="line.90"></a>
<FONT color="green">091</FONT>                while (resources.hasMoreElements()) {<a name="line.91"></a>
<FONT color="green">092</FONT>                    URL resource = resources.nextElement();<a name="line.92"></a>
<FONT color="green">093</FONT>                    dirs.add(resource.getFile());<a name="line.93"></a>
<FONT color="green">094</FONT>                }<a name="line.94"></a>
<FONT color="green">095</FONT>                TreeSet&lt;String&gt; classes = new TreeSet&lt;String&gt;();<a name="line.95"></a>
<FONT color="green">096</FONT>                for (String directory : dirs) {<a name="line.96"></a>
<FONT color="green">097</FONT>                    classes.addAll(findClasses(directory, packageName));<a name="line.97"></a>
<FONT color="green">098</FONT>                }<a name="line.98"></a>
<FONT color="green">099</FONT>                ArrayList&lt;Class&lt;?&gt;&gt; classList = new ArrayList&lt;Class&lt;?&gt;&gt;();<a name="line.99"></a>
<FONT color="green">100</FONT>                for (String clazz : classes) {<a name="line.100"></a>
<FONT color="green">101</FONT>                    classList.add(Class.forName(clazz));<a name="line.101"></a>
<FONT color="green">102</FONT>                }<a name="line.102"></a>
<FONT color="green">103</FONT>                return classList.toArray(new Class[classes.size()]);<a name="line.103"></a>
<FONT color="green">104</FONT>            } catch (Exception e) {<a name="line.104"></a>
<FONT color="green">105</FONT>                LOG.error(e.getMessage(), e);<a name="line.105"></a>
<FONT color="green">106</FONT>                return null;<a name="line.106"></a>
<FONT color="green">107</FONT>            }<a name="line.107"></a>
<FONT color="green">108</FONT>        }<a name="line.108"></a>
<FONT color="green">109</FONT>    <a name="line.109"></a>
<FONT color="green">110</FONT>        /**<a name="line.110"></a>
<FONT color="green">111</FONT>         * Private constructor.<a name="line.111"></a>
<FONT color="green">112</FONT>         */<a name="line.112"></a>
<FONT color="green">113</FONT>        private ClassUtil() {<a name="line.113"></a>
<FONT color="green">114</FONT>            super();<a name="line.114"></a>
<FONT color="green">115</FONT>        }<a name="line.115"></a>
<FONT color="green">116</FONT>    <a name="line.116"></a>
<FONT color="green">117</FONT>    }<a name="line.117"></a>




























































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